Limekiln



e Arme PATENT OFFICE, i

GLARK D; PAGE, 'OF ROCHESTER, NEW YORK.

LIMEKILN.

Specificatioh of Letters Pate'nt No. 10,510, dated February" 7, 1854;

Toall whom it may concem: i

g Be it known that I, CLARK D. PAGE, of the city of Rochester, in the county of Monroe andState of NewYork, have invented certain new and useful Inprovements in Limekilns, of which the following is a full, clear, and eXact description, reference being had to the 'accompanying drawings, making part of this specification, in which 4 Figure 1 is an isometrical view; Figs. Qand 3 are Vertical sections taken in planes at right angles to each other; Fig. 4 is a horizontal section taken at the line A, a of Fig. 2. Fig. 5, is a Vertical section taken at the line B, b of Fig. 4:.

The letters of reference refer to the same parts in the different figures wherever they occur.

In my improved kiln for burning -lime stone the charge is placed in a vertical stack or cupola, to which the fiame and gaseous products of combustion are admitted from suitable fire chambers.

The'first part of my invention which relates to the form of the stack, consists in making that part of the stack which receives the fiame directly from the surrounding fires, smallest, and then a short distance above this, spreading it out to its greatest diameter. r

The object of this peculiar form in connection with the location and arrangement of the fire chambers and flues, is, that the fiame and heat 'which enter* at the smallest part of the stack may reach the center of the charge to burn that part of the charge, which in other kilns is 'very seldom effected.

'The second part of my invention consists in combining with the stack, and at the lower end thereof below the fire chambers, a cold air fine which performs the double purpose of cooling and dividing the lime as it descends, and before it is drawn out and' exposed to the action ,of atmospheric air. This cold air flue extends across, and di- Vides the lower end of the stack into two parts. `It is made of metal, receives cold air in front which passes through it, and by rarefaction ascends, and escapes through a flue built in the wall.

In the accompanying drawings a represents the walls of the kiln, which must be built of suitable materials, and strength, and inclosing the stack or cupola b, which extends Vertically through the entire height.

Thisstack from the level of the fire chambers c, c, upward, for about five feet to d, is cylindrical or nearly so, at d it begins to spreadand enlarges up to the opening of the gas flues e, e, say a distance r fivelfeet from d, and thence upward to f, f, VVithin a short'distance of the top it is'graduall'y' contracted, so as 'to be reduced to the same size as the level of the fire chambers; The

upper end at g isfunnel, shaped to facilitate y the introduction of the charge.

There are two main fire chambers c, 0, one on each side, arched over at the top, provided with a large grate in the usual manner for burning, and an ash pit below.

- There is a door h above the grate forfuel fiues 6, extend through the top arch to a chamber Z over each fire place, in which chamber is placed a cylindrical or other formed, steam boiler m, so that thegaseous products of combustion from the main fire places which do not escape to the stackwith the fiame through the fiues j, j, will rise and circulate around the boiler to generate steam, and thence pass out through flues e, e, I i

and enter the charge in the stack at, its greatest width, to aid in heating thestone as it is descending in the process of calcinai tion. From each boiler a steam pip e n, eX tends up nthe wall, and is bent inward near the top to discharge a j etof steam into the charge of stone to facilitate the "liberation of carbonic acid gas, and at the same '5 time to improve the draft through the charge. 4

By the side of each of the main firecham bers there is an auxiliary fire chamber' 0 adapted to the burning of charcoal, and therefore provided with a grate, and ash pit, being provided with doors in the usual manner. And from each of these auxiliary fire chambers one or two fiues p, p, eXtend horzontally to, and enter the stack at or i near the same level with the fiues j, j. The mam fire places are charged with wood, and

the auxiliary fire chambers with 'the coals g term a metallic saddle q on which thelime restsr and which divides it, one half going on each side, to be drawn out at the proper time through two passages 7", 7". This metal lic saddle is hollow and* receves cold air through an aperture s, in front, and discharges it, through a fiue t extending to, and through the top. 'In this way I cause a current of cold air to. circulate through the inside of this saddle for the purpose of cooling 'the calcined lime as it descends, and before it is drawn out, and exposed to the direct action of atmospheric air, which, it is known, has the effect to slack lirne when it is brought in contact With it at a high temperature; The charge of lmestone is introduced at the top, andas it is calcined and drawn out at the bottom, the supply must be contnued at top.

By the pecular form of the stack in connection with the supply of flame and other products of combustion at the small part of the stack, I am enabled effectually to burn or calcine the central part of the charge. And by the introduction of the current of cold air through What I term the saddle I amenabled to bring down the temperature of the calcined lime, so that it can be drawn out without danger of being air V 'Slacked-. u

What I claim as my invention and desire to secure by Letters Patet, isi 1. The form substantially as described, of the stack or cupola, in combinaton With the arrangement of fiues from the fire chambers for the` introduction of the products of combustion at the lower end, substantially as specified, to insure the burning of the CLARK D. PAGE.

Witnesses CHAS. EVERETT, S. W. FoRREsT. 

